#include<stdio.h>
#include<unistd.h>

int main()
{
  pid_t id = fork();

  if(id<0)
  {
    //创建失败
    perror("fork");
    return 1;
  }
  else if (id==0)
  {
    //子进程
    while(1)
    {
      printf("i am child, pid:%d, ppid:%d\n",getpid(),getppid());
      sleep(1);
    }
  }
  else
  {
    //父进程
    while(1)
    {
      printf("i am father, pid:%d, ppid:%d\n",getpid(),getppid());
      sleep(1);
    }
  }


  printf("lalala\n");

  sleep(1);

  return 0;
}
